Anyone had serious problems with Walbro pumps?
06-25-03, 09:04 AM
#1
It's never fast enough...
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Anyone had serious problems with Walbro pumps?
There are a **** load of them on Ebay and am wondering if they either:
A) Really Suck
B) Over Stocked
Considering I can get one for $82, and I plan to stay with the twins or upgraded twins, $82 seems really tempting
A) Really Suck
B) Over Stocked
Considering I can get one for $82, and I plan to stay with the twins or upgraded twins, $82 seems really tempting
06-25-03, 11:24 AM
#3
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The Buick GN guys mostly run these. They have no problems and it's enough pump to push those bricks down into the 12's and lower. I have one in our project car, works great.
06-25-03, 11:30 AM
#4
06-25-03, 11:34 AM
#5
Eats, Sleeps, Dreams Rotary
Originally posted by GoodfellaFD3S
I heard enough horror stories (mainly from Mustang guys) that I switched in a nippondenso one. Plus, the little buggers are so small . Maybe run two of them?
I heard enough horror stories (mainly from Mustang guys) that I switched in a nippondenso one. Plus, the little buggers are so small . Maybe run two of them?
I too have read some stories about the whalbro
06-25-03, 11:43 AM
#6
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The whalbro is cheep but I went with the nippondenso for piece of mind. It was a direct replacement for the stock one. I have also heard things about the whalbro failing when you need it the most, i.e. WOT.
06-25-03, 12:14 PM
#7
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Originally posted by matty
some did a test...the nippondenso's flow much better.
I too have read some stories about the whalbro
some did a test...the nippondenso's flow much better.
I too have read some stories about the whalbro
http://www.wvinter.net/~flanham/wlan...l/fuelfaq.html
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06-25-03, 12:24 PM
#8
Eats, Sleeps, Dreams Rotary
Originally posted by HedgeHog
I think it was the other way around...
http://www.wvinter.net/~flanham/wlan...l/fuelfaq.html
I think it was the other way around...
http://www.wvinter.net/~flanham/wlan...l/fuelfaq.html
06-25-03, 12:38 PM
#9
I've got a walbro & a K&N fuel filter. SOMETHING is seriously wrong! My AF is fine up to 6K then it goes way lean & the more volume I try to flow (IE higher inj duty) the worse it gets.
I'm done screwing around & will be going with Aeromotive pump & filters. I'll probably do the pump controller & FPR as well, first things first.
I'm done screwing around & will be going with Aeromotive pump & filters. I'll probably do the pump controller & FPR as well, first things first.
06-25-03, 12:52 PM
#10
Super Snuggles
Originally posted by HedgeHog
I think it was the other way around...
http://www.wvinter.net/~flanham/wlan...l/fuelfaq.html
I think it was the other way around...
http://www.wvinter.net/~flanham/wlan...l/fuelfaq.html
PLEASE NOTE, RC ENGINEERING NOW PERFORMS A FUEL PUMP FLOW MEASURING SERVICE. IT HAS BEEN FOUND THAT THE NIPPONDENSO COSMO FUEL PUMP AND THE WALBRO GSS-341 FLOW APPROXIMATELY THE SAME (THE COSMO ACTUALLY FLOWS A BIT MORE). IT WAS ALSO FOUND THAT THE COSMO PUMP HAS A MUCH HIGHER CURRENT DRAW THAN THE WALBRO OR BOSCH PUMPS. BECAUSE OF THIS, I SUSPECT THE POOR PERFORMANCE OF THE COSMO PUMP IN RX-7S MIGHT BE EXPLAINED BY INSUFFICIENT STOCK WIRING (WHICH IS SUFFICIENT FOR THE BOSCH AND WALBRO PUMPS).
SO PLEASE DISREGARD THE FOLLOWING COMMENT THAT THE COSMO FLOWS SIGNIFICANTLY LESS THAN THE WALBRO AND BOSCH, BECAUSE IT APPEARS TO BE INCORRECT. I WILL TRY TO UPDATE THIS WEB PAGE AFTER GATHERING MORE INFORMATION FROM RC ENGINEERING FUEL PUMP TESTS.
I APOLOGIZE FOR ANY INCONVENIENCE THIS MAY HAVE CAUSED.
SO PLEASE DISREGARD THE FOLLOWING COMMENT THAT THE COSMO FLOWS SIGNIFICANTLY LESS THAN THE WALBRO AND BOSCH, BECAUSE IT APPEARS TO BE INCORRECT. I WILL TRY TO UPDATE THIS WEB PAGE AFTER GATHERING MORE INFORMATION FROM RC ENGINEERING FUEL PUMP TESTS.
I APOLOGIZE FOR ANY INCONVENIENCE THIS MAY HAVE CAUSED.
06-25-03, 12:55 PM
#12
Super Snuggles
Despite all the good things I've heard about the Walbro, I'd still (and will be) go with the Bosch pump for sheer size. The more surface area it has, the cooler it's going to run, all things being equal, and the Bosch certainly wins there...
06-25-03, 02:38 PM
#14
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Ive been advised against the walbro too... Although ive never had any problems in personal expeirences... However an extra 50-75$$ for that kind of peace of mind.... I just dont know
06-25-03, 03:30 PM
#15
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Originally posted by jimlab
Did you notice this section?
Did you notice this section?
Whoops...thx for the heads-up, Jim. I just posted the link based on my favourites...haven't read it recently. But, yeah, the Bosch pump from Rippie seems the best option...still a decent price too.
06-25-03, 04:18 PM
#16
Super Snuggles
Originally posted by HedgeHog
Whoops...thx for the heads-up, Jim. I just posted the link based on my favourites...haven't read it recently. But, yeah, the Bosch pump from Rippie seems the best option...still a decent price too.
Whoops...thx for the heads-up, Jim. I just posted the link based on my favourites...haven't read it recently. But, yeah, the Bosch pump from Rippie seems the best option...still a decent price too.
I'll be running two Rippie pumps, and probably the Aeromotive "fuel computer". It does basically the same thing the stock fuel pump resistor did (which is long gone) and drops voltage to the pump(s) below X rpm, but it is programmable.
http://216.242.145.16/products/product.phtml?p=31
I hate to run more electronic gadgets than I have to, but I also don't want to be running two pumps full volume all the time, either.
06-25-03, 09:55 PM
#18
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don't tell me that, i JUST put mine in 2 hours ago. getting ready to take it to gotham racing next week (the 5th) for single upgrade and fmic etc
06-25-03, 10:49 PM
#19
It's never fast enough...
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I think I'm gonna jump on one.
I just went through Max's neat little fuel calculator at http://www.maxcooper.com/rx7/how-to/...tem/calcs.html
and for what I plan to run, it seems to be just fine.
I understand the fact that every once in a while, someone is bound to get a deffective unit. I'll just make sure to run it for a while before I boost.
I just went through Max's neat little fuel calculator at http://www.maxcooper.com/rx7/how-to/...tem/calcs.html
and for what I plan to run, it seems to be just fine.
I understand the fact that every once in a while, someone is bound to get a deffective unit. I'll just make sure to run it for a while before I boost.
06-26-03, 01:52 AM
#24
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Originally posted by crazysuprakid
Anyone using the RP fuel pump? What's in a replica of? How's it stack up?
Anyone using the RP fuel pump? What's in a replica of? How's it stack up?
06-26-03, 05:17 AM
#25
Original Gangster/Rotary!
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Originally posted by Flybye
Has anyone seen the chart on this site?
http://www.stealth316.com/2-fuelpumpguide.htm
Has anyone seen the chart on this site?
http://www.stealth316.com/2-fuelpumpguide.htm
Using Max's site, I have enough injector (850s and 1300s) to support 444 rwhp at 85% duty cycle.
I also need a pump that will flow 211 L/hr at 72 psi.
Checking the link in Flybye's post and scrolling all the way to the table at the bottom, I find that my Supra TT pump will flow 232 L/hr at 13.5 volts and 70 psi. At 75 psi it does drop quite a bit, to 209.
Based up on all of this, I have more than enough injector for my current setup. What I need to do is verify the voltage through the pump, and look into using some thicker gauge wiring and upping the voltage a bit. It would appear that the pump is sufficient for my current needs (400 to the ground) but I'd like a bit more margin for error.
Now, I'm no expert with this stuff, but this is how my little brain interprets it all
. Would anyone like to piggyback on this?